Speed-transmission mechanism.



J. BARNES.

SPEED TRANSMISSION MBGHANISM. APPLIUATION FILED APn.2o,1eoa.

Patented Jan. 31,1911.

Wl'nesses.' llave/afar.' V

(Md/,f A Mm v60/MM. How. @7C/0L @Mu/L.

J. BARNES. SPEED TRANSMISSION MBCHANISM. APPLICATION FILED APB.2o,19os.

Patented Jan. 31,1911.

2 SHEETS-SHEET 2.

im? L0 JOHN BARNES, F ROCKFORD, ILLINOIS.

SPEED-TRANSMISSION MECHANISM.

esame.

Specification of Letters Patent. Application led April 20, 1908. SerialNo. 428,047.

Patented aan. ai, 1911.

To all whom it may concern.:

Be it known that I, J oHN BARNES, a citizen of the United States,residing at Rockford, in the county of Winnebago and State of Illinois,have invented certain new and useful Improvements in Speed-TransmissionMechanism, of which the' `following is a specification.

The object of this invention is to construct a transmission mechanismfor motor vehicles and the like, in which friction is employed instarting the driven shaft, and given speed is attained the frictiondrive is cut out and a connection made between the driving and drivenshafts.

In the accompanying. drawings, Figure 1 is a plan view of Vmy improvedtransmission mechanism, in which portions are removed and other portionsare sectioned. Fig. 2 is a side elevation, in which the casing is shownin section. Fig. 3 is a face representation of a portion of the frictiondisk in which parts are broken away and other parts sectioned. Fig. 4 isan edge view of a portion of the friction disk. Fig. 5 is a section ofthe friction disk showing the means for varying the width or. thicknessof the disk on dotted line a a Fig. 3. Fig. 6 is a section on dottedline l) Fig. 1.

The frame for supporting the operative parts comprises the casing 1provided with bearings 2 and 3, and a support 4. From the lower portionof the casing extends two angle bar rails 5 and 6 which are united bythev end section 7. The rail 5 supports a bearing 8, and the rail 6supports a bearing 9. A driven shaft 1() is supported by the bearings 8and 9. To this driven shaft 10 are fixedly connected a friction disk,and a beveled gear 12. The friction disk is in two sections 13 and 14which are connected by the screw-threads 15. The section 13 has aninternal gear 15%, and the section A14 has an opening 16 through which aspur pinion 17 may be placed in engagement with the interna-l gear15.12. This spur pinion 17 has a handle 18 by which it may be turned. Byrotating this spur pinion 17, the section 13 will be turned aXiallythereby moving the sections with respect to each other to vary thethickness of disk as a whole. To the outer edge of the -section 14 issecured a spring bar 19 having one end provided with a pin 2O whichextends through an opening 21 in the edging 22 and into one of theseries of openings 23 in the edging of the section after a 1 3. This pin20 serves to lock the two sections 13 and 14 together after beingadjusted by the. spur pinion 17.

The section 13 is secured to ring 24 by the rivets 25 and the ring isconnected to the flange 26 of the hub 27. The outer edges 2.8 and 29 ofthe sections 13 and 14 res ctively are beveled, likewise the inner e ges30 aiid 31. The bearings 3 and 9 support a driving shaft extension 32 ina manner to freely rotate therein. On this shaft extension is looselymounted a bevel pinion 33 which is held in position by the bearing 9 andmeshes with the bevel gear 12. On this shaft extension 32 is splined afriction wheel 34 which is capable of being moved in the lengthwisedirection of the shaft, and always rotating With the shaft. Thisfriction wheel is adapted to be moved into engagement with the section13 of the friction disk, and to travel across the face of the sectionuntil it leaves the inner edge of the section. One face of this frictionwheel is provided with a clutch face 35, which, when the wheel is movedtoward the beveled pinion 33, will engage the clutch face 36 of thebevel pinion 33 thereby forming a direct connection between the shaftextension and the bevel pinion 33, and through the bevel gear 12 to thedriven shaft 10.

To the shaft extension 32 is pinned a spur gear 37 and is formed with aclutch face 38. A driving shaft 39 is supported in the bearing 2 and bya projection 40 entering a recess in the end of the shaft extension 32.On this driving shaft is loosely mounted a sprocket wheel 41 having aclutch face 42, and a double clutch section 43 has a splined connectionwith the driving shaft, and is adapted to be moved into engagement witheither of the clutch faces 38 or 42.

A secondary shaft 44 has one end supported in a bearing 45 having a sideprojec* tion 46 pivoted to the support 4 for the bearing. To thissecondary shaft are ixedly connected a sprocket wheel 47 and spur gear48. The other end of this secondary shaft is supported in a box 49 whichis located on a ledge 50 formed in the rail 5 of the main frame. Thisbox 49 is adapted to slide 0n the ledge, and a bell-crank 51 has one armpivoted a rod 52 connected therewith by which the bell-crank is rockedon its pivot 53 thereby moving the secondary shaft on the pivot 54. Thissecondary shaft supports a friction to the box 49 and .its other arm haswheel 55 which is splined thereto and capable of being moved in the lenhw-ise direction of the shaft in contact with the section 14 of thefriction disk. By moving the box 49 supporting one end of the secondaryshaft the frictional Wheel 55 will be held free of the friction diskduring its movement along the shaft.

Thel spur gears 37 and 48 are in constant mesh, and a chain 56 connectsthe sprocket wheels 41 and 47.

The driving shaft is intended to connect with an engine or other motivepower, and the drivcn shaft intended to connect with the supportingwheels of a motor vehicle. rlhe friction wheels 34 and 55 are intendedto be connected in any suitable manner to move together along theirrespective shafts, one on each side of the friction disk.

In starting the rotation of the driven shaft in a direction to givespeed ahead, the double clutch section 43 is moved into engagement withthe clutch face 38 of the spur gear 37. This connection will rotate thespur gear 48 and will rotate the extension shaft 32 and secondary shaft44 in opposite directions and toward one another, which will rotate thefriction wheels 34 and in like directions. The friction wheels 34 and 55are then moved onto the faces of the sections 13 and 14 of the frictiondisk, which will rotate the friction disk, and it in turn will rotatethe driven shaft 10, slowly at first. As the friction Wheels are movednear the center of the friction disk, the speed of the disk will beincreased and the speed of the driven shaft will also be increased. Justas the friction Wheels 34 and 55 leave contact with the friction disk atthe inner edges of the sections 13 and 14,'the clutch face 35 of thefriction wheel 34 will engage the clutch face 36 of the bevel pinion 33,thereby forming a connection between the driving shaft with the drivenshaft, through the extension shaft 32, friction wheel 34, bevel pinion33 and bevel gear 12.

In reversing the direction of rotation of the driven shaft, the doubleclutch section 43 is moved into engagement with the clutch face 42 ofthe sprocket wheel 41, thereby imparting motion from the driving shaft39 to the secondaryshaft l44 in the same direction. The spur gears 37and 48 being in mesh and the extension shaft 32 being free to be drivenby the secondary shaft, the friction wheels 34 and 55 will revolve inopposite directions, and in directions opposite to that at which theywere being driven when the driven shaft was being rotated ahead. Whenthe friction wheels are moved in contact with the friction disk, thedisk will be rotated in a reverse direction which will rotate the drivenshaft backward, thereby backing the motor vehicle. By moving thesecondary sha-ft 44 on its pivot 54 the friction wheel `55 will be heldfree of the disk, thereby decreasing'the frictional contact of thefriction Wheel 34 Wit-h the friction disk, to an extent that thefriction disk will not be rotated. This freeing movement of the frictionwheel can take place at any point that the friction Wheels are incontact with the friction disk. y

By providing the sections 13 and 14 with the beveled edges 28I and 29respectively, the friction Wheels can be moved free of the friction diskwhile in motion, which will allow the friction disk to remain at rest,and can be moved in engagement with the faces of the sections while theyarev in mo tion.

I claim as my invention:

1. The combination of a driving shaft and a driven shaft, an extensionof the driving shaft in alinement therewith, a secondary shaft locatedparallel with thel shaft extension, a friction Wheel for the shaft eX-tension, a friction wheel -for the secondary shaft, both wheels capableof movement in the lengthwise direction of their shafts. and rotatedthereby, a spur gear fixedly connected to the shaft extension, a spurgear iXedly connected to the secondary shaft and in mesh with the gear on the shaft eXtension, a driving connect-ion between the driving shaftand shaft extension, and a friction disk fiXedly connected with thedriven shaft .with which the friction wheels engage.

2.' The combination of a driving shaft and a driven shaft an extensionof the driving shaft in alinement therewith, a secondary shaft locatedparallel with the shaft extension, a friction wheel for the shaft eX-tension, a friction wheel for the secondary shaft both wheelsI capableof movement in the lengthwise direction of their shafts and rotatedthereby, a spur gear fiXedly connected to the shaft'extension, a spurgear fiXedly connected to the secondary shaft and in mesh with the gearon the shaft eXtension, a driving connection between the driving shaftand shaft extension, a sprocket wheel loosely mounted on the drivingshaft and having a clutch face, a clutch section splined on the drivingshaft and adapted to engage the clutch face of the sprocket wheel, asprocket wheel fixedly connected with the secondary shaft, a chainconnecting the sprocket wheels so that both revolve in the samedirection, and a friction disk iXedly connected with the driven shaftwith which the wheels engage.

3. The combination of two shafts arranged in parallel relation, afriction wheel supported by each shaft, driven thereby and capable ofmovement along the shafts, and a friction disk disposed between thewheels, thedisk comprising two screw-threaded connected sections, meansfor turning one section with respect to the other section to vary thethickness of the disk, and means for holding the sections when adjusted.

4. The combination of two shafts arranged in parallel relation, afriction wheel supported by each shaft, driven thereby and capable ofmovement along the shafts, and a friction disk disposed between thewheels, the disk comprisingv two screw-threaded con nected sections, oneof the sections having an internal gear, a spur pinion capable ofmeshing with the internal gear for varying the thickness of the disk;and means for holding the sections when adjusted.

In testimony whereof I have hereunto set 15 my hand in presence of twosubscribing witnesses.

JOHN BARNES.

Witnesses:

A. O. BEHEL, E. D. E. N. BEHEL.

